target/linux/bcm27xx/patches-6.1/950-0930-drm-vc4-Fix-FKMS-for-when-the-YUV-chroma-planes-are-.patch

   1 From bb1ee75de382c7a5218750476aa2a5792309cc70 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 30 Mar 2023 17:18:36 +0100
   4 Subject: [PATCH] drm/vc4: Fix FKMS for when the YUV chroma planes are
   5  different buffers
   6
   7 The code was assuming that it was a single buffer with offsets,
   8 when kmstest uses separate buffers and 0 offsets for each plane.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 10 +++++++---
  13  1 file changed, 7 insertions(+), 3 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  17 @@ -528,7 +528,7 @@ static int vc4_plane_to_mb(struct drm_pl
  18                            struct drm_plane_state *state)
  19  {
  20         struct drm_framebuffer *fb = state->fb;
  21 -       struct drm_gem_dma_object *bo = drm_fb_dma_get_gem_obj(fb, 0);
  22 +       struct drm_gem_dma_object *bo;
  23         const struct drm_format_info *drm_fmt = fb->format;
  24         const struct vc_image_format *vc_fmt =
  25                                         vc4_get_vc_image_fmt(drm_fmt->format);
  26 @@ -552,6 +552,7 @@ static int vc4_plane_to_mb(struct drm_pl
  27                                         state->normalized_zpos : -127;
  28         mb->plane.num_planes = num_planes;
  29         mb->plane.is_vu = vc_fmt->is_vu;
  30 +       bo = drm_fb_dma_get_gem_obj(fb, 0);
  31         mb->plane.planes[0] = bo->dma_addr + fb->offsets[0];
  32
  33         rotation = drm_rotation_simplify(state->rotation,
  34 @@ -572,11 +573,14 @@ static int vc4_plane_to_mb(struct drm_pl
  35                 /* Makes assumptions on the stride for the chroma planes as we
  36                  * can't easily plumb in non-standard pitches.
  37                  */
  38 +               bo = drm_fb_dma_get_gem_obj(fb, 1);
  39                 mb->plane.planes[1] = bo->dma_addr + fb->offsets[1];
  40 -               if (num_planes > 2)
  41 +               if (num_planes > 2) {
  42 +                       bo = drm_fb_dma_get_gem_obj(fb, 2);
  43                         mb->plane.planes[2] = bo->dma_addr + fb->offsets[2];
  44 -               else
  45 +               } else {
  46                         mb->plane.planes[2] = 0;
  47 +               }
  48
  49                 /* Special case the YUV420 with U and V as line interleaved
  50                  * planes as we have special handling for that case.